import java.util.*;
public class Main {
    public static void main(String args[]) {
        double a = 0, b = 0, c = 0;
        a = 55;
        b = 66;
        c = Math.asin(0.67);
        System.out.println(c);
        c = Math.cos(12.56);
        System.out.println(c);
        c = Math.exp(2);
        System.out.println(c);
        c = Math.log(15);
        System.out.println(c);
    }
}